Wire-drawing machine.



Patented May 7, 1918.

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E. H. CARROLL.

WIRE DRAWING MACHINE.

APPLICATION FILED JUNE 24. 19l4. J1 65,U49., Patented May 7,1918.

2 SHEETS-SHEET 2- wovney ELBERT H. CARROLL, 0F WORCESTER, MASSACHUSETTS, ASSIGNOR TO "ll/[ORGAN CONSTRUCTION COMPANY, OF WORCESTER, .MASSACHUSETTS, A CORPORATION O15 MASSACHUSETTS.

To all whom it may concern:'

Be it known that 1, Fraser H. CARROLL, a citizen of the United States residing at Worcesten in the county of Worcester and Commonwealth of Massachusetts, have invented a new and useful Improvement in Wire-Drawing Machines, of which the following, taken in connection with the accompanying drawings, is a specification.

The present invention relates to that class of wire drawing machines in which a rotat- I ing block is employed, whereon the wire is wound as it is drawn through a reducing die. The invention aims to provide an improved mechanism for connecting said block to and disconnecting it from its driving mechanism.

Another object is to provide means for automatically stopping the rotation of the block when a breakage occurs in the wire being drawn, between the reducing die and the drum, and also for automatically stopping the rotation of the block when the wire which is being drawn, runs out.

It is further proposed to make the operation of the mechanism-responsive to the tension on the wire that is being drawn, by preventing the rotation of the block when from any cause the wire begins to run free through the reducing die, 2'. e., when no reduction in the diameter of the wire is being effected.

A still further object is to provide an improved means for stopping the rotation ofthe block when the progress of the wire to the die is liable to be impeded by a kink or bend in the wire.

Other and further objects will appear from the following description and the appended claims, taken in connection with the accompanying drawings, in which Figure 1 is a plan view of a wire drawing machine embodying my invention.

Fig. 2 is a side elevation 'of'the same.

Fig. 3 is a detail viewin elevation of a portion ofthe mechanism at the left hand end of Figs. 1 and 2.

Fig. 4 is an elevati of the mechanism viewed in the plane of line 4=4=, Fig. 1.

onal view of a portion the Specification of Letters Patent.

Patented new, rate.

Application filed June M, 1914. Serial No. M'ZALOG.

Fig. 5 is a view similar to Fig. 4: showing the parts in another position.

Similar reference characters refer to similar parts in the diiferent figures.

Referring particularly to Figs. l and 5, 1 indicates a rotatable wire drawing block, which is adapted to be connected to its driving mechanism, by a suitable clutching mechanism, not shown, which may be conveniently located within the interior of said block similarly to the clutching mechanism shown and described in United States Letters Patent No. 1,008,950, granted to me November 14, 1911, although ll do not limit myself to the use of a clutching mechanism of the particular type shown and described therein. 7 I

For the purposes of the present invention it is suflicient to state that there is associated with the block 1 a movable member having operative connection with any type of clutching mechanism, and adapted to effeet the engagement and disengagement of the latter when moved into diflerent positions. 3

In the present instance said movable member takes the form of a ring 2, encircling the lower end of the block 1 and carrying rods 2 which connect it to the clutching mechanism. Tn the position of the parts shown in Fig. 4: the said ring is held in an elevated position by arms 3, 3, hereinafter referred to, and in this position the clutching mechanism is disengaged.

In the position of the parts shown in Fig.v e5 5, the ring 2 has been permitted to assume a lower position on the block, in which position the clutching mechanism is rendered operative to connect the block to its driving mechanism. The arms 3, 3, which engage W the under side of the ring 2 at diametrically opposite points are rigidly secured to the ends of a rock shaft 4 mounted in the framework of the machine, and said shaft is provided with a rigid arm 5, extending in the 'opposite direction from the arms 3, 3. The

naled on a fixed shaft supported in the framework. A link ll pivotally connected to the arm 9 at the point 12, between the shaft 10 and the pivotal point 8, has its other end pivotally connected at 13 to an arm 14 secured to a rock shaft 15 mounted in the framework. The shaft 15 carries on its outer end a foot treadle 16, which for convenience and accessibility is bent as shown in Fig. 1, to permit its end 17 to be engaged by the foot of the operator.

spring 18 secured at one end to the pivotal connection'12, and at the other end to a fixed portion of the framework, operates to maintain the treadle mechanism in the position shown in Fig. 4, with the clutching mechanism disengaged, the end 17 of the treadle elevated and a projection 19'on the arm 14a clutching mechanism.

In the initial movement of the linkage from the position\ shown in Fig. 4 to that shown in Fig. 5, by the depression of the treadle, the point 8 is carried to the right of the line joining the point Sand the axis of shaft 10, and as soon as this much of the clutching movement has been accomplished,

the weight of the ring 2 and its associated.

parts bearing on the arms 3, 3, is edective in partially overcoming the opposition of the spring 18 to the movement of the linkage in this direction. In other words, the tendency ofthe ring 2 and its associated parts is to assist the movement of the mechanism to the clutching position and toresist the return thereof to unclutching position after the point 8 has passed theucenter line above referred to. Further depression of the 'treadle as above described carries the point 13 to the right of the line joining the points 12 and 15, and thereafter the movement of the linkage is stopped by the engagement of the right hand edge of the arm 14 with a stop 21 carried by the framework. The movement of said point 13 past the said center line locks the mechanism in the position shown in Fig. 5, the spring 18 being ineffective to produce a return movement of the linkage until the point 13 is again car ried to the left or saidcenter line by a rocking of the treadle in the opposite direction. In the position thus assumed, shown in Fig. 5,the arms 3, 3, are withdrawn from the support of the ring 2, but it will be apparent that if from any reason said ring and its associated parts continue to rest on said arms, the weight of said ring and parts would be exerted to develop still further the resistance to the return movement of the linkage to the unclutching position. '50

In the operation of unclutching, a slight depression of the opposite end of the treadle 16, to rock the shaft 15 in a counter-clockwise direction, carries the point 13 to the left of the line which joins the points 12 and 15. Such movement renders the full force of the expanded spring 18 operative to con tinue the movement of the linkage in this direction, and ultimately to the position shown in Fig. 4. Just before this positionv is reached the point 8 passes to the left of the line joining the points 6 and 10, with the result that the weight of the ring 2 and associated parts, which bears on the arms 3, 3, is rendered eiIective to assist the action of the spring, thereby causing the parts to be securely locked in the position shown in Fig. 4:. From the above, it will be seen that a very slight rocking movement of the shaft 15 is all that ,is necessary to bring the spring 18 into action to disengage the block 1 from its driving mechanism, and that the continued action of said spring ultimately effects a locking of the parts in the unclutched position.

The wire drawing block 1 is provided with a suitable wire gripping device, not shown, by which the end of the wire 22, Fig. 1, may be seized and drawn through a re ducing die 23 held in a die box 2 1. A swinging member 25 pivoted at 26 to the framework, has secured therein a vertical stud 27, to the upper end of which the rear end of the die box 24 is pivoted by means of a pin 28 passing through said stud and a 105 pair of parallel ears 29 formed on the die box. A spring 80, confined within a recess 31 of the framework, exerts pressure against one edge of the swinging member 25 to maintain a lateral arm 32 of said member in no contact with an underlying lateral arm 33 of another swinging member 34:, pivoted to swing freely on a short shaft 85 carried between ears 36, 36, forming part of the fixed framework, see Fig. 8.

Ihe two ends of a member 37, bent in the form of a loop, are secured to the vertically disposed portion of the swinging member 3 1, the said loop being adapted to stand in a substantially vertical position in a plane 120 transverse to the wire 22 on its way to the reducing die, with said wire passing approximately through the central portion. of said loop. The arm 33 of the second swinging member 341 rests upon the upper end of: a 1225 rod 38, which is mounted for reciprocating movement in a guide 39, secured by bolts 1-0 to the framework. The rod 38 carries an enlargement 41, adapted for movement .within a correspondingly shaped bore in 130.

weenie said guide, and a spring 42, disposed within said bore, bears against the under s de of said enlargement to yieldingly malntaln said rod in the position shown in Fig. 2. The lower end of said rod liesin juxtapositlon to the left hand end of the treadle 16, so that a slight depression of said rod in the manner hereinafter set forth efiects a corresponding rocking of said treadle, sufficient to carry the point 13 to the left of the line between the points 12 and 15, and thereby causes the disconnection of the clutching mechanism, as hereinbefore set forth.

In operation, the end of the wire 22 is passed through the reducing die 23 and secured to the gripping device carried by the block 1. The depression of the end 17 of the treadle 16 starts the rotation of the block in the manner hereinbefore described. lf however, the wire passes freely through the die 23, without exerting any appreciable for ward pull on the die box, the release of the treadle 16 from the foot of the operator results in an immediate stopping of the block, due to the action of the spring 30 against the swinging member 25, the arm 32 of said member acting through the arm 33 of the freely swinging member 34 to depress the rod 38 against the treadle 16 and thereby move the shaft 15 through an arc suficient to bring the linkage under the influence of the spring 18 to unclutch the block. When the wire, by reason of resistance to being drawn through the die, exerts a pull on the die box, the spring 30 is compressed within the recess 31, as shown in Fig. 2, and the rod 38 is relieved of the pressure of the arm 32. Should the wire break, during the operation of drawing, between the reducing die 23 and the block 1, the force holding the spring 30 under compression is immediately relieved, whereupon the arm 32 is rendered efi'ective to depress the rod 38 and stop the block, in the manner before described.

It will be apparent also that when the wire has run out through the die, either because the end of the coil from which it is drawn has been reached, or because of a break in the wire between said coil and the reducing die, the tension on the die box will be relieved, and the rotation of the block will be stopped by the depression of the rod 38 against the treadle.

In the process of drawing, the wire on its way to the reducing die is sometimes subject to kinks, twists, or bends, and for the purpose of stopping the drawing operation upon the approach of such an obstruction to the die, the looped member'37 is provided. The contact. of such a kink or bend with the sides of the loop efi'ects the forward rocking of the member 34: to cause its arm 33 to depress the rod 38 and sto the rotation of the block, as reviously set orth. H 6 the above described mechanism, the rescribed. The light spring tation of the wire drawing block will be stopped under the following conditions: first, when the rear end of the wire runs out through the reducing die; second, when a break occurs in the wire between the die and the block; third, when the diameter of the of the spring 30 to'compress the latter with in the recess 31 with a consequent forward movement of the die box. llf the wire passing through the die exerts suflicient pull on the die box to maintain the spring 30 under.

compression, the rotation of the block will continue after the treadle is relieved of the pressure of the operators foot; otherwise, the withdrawal of the pressure of the operators foot permits the spring 30 to move the member 25 about its pivot through a small arc, as determined by the stop 43, and this movement is sufficient to efi'ect the depression of the rod 38 against the treadle 16 to bring the spring 18 into action to disengage the clutching mechanism, as hereinafter de- 4r2 serves to keep the rod 38 in constant yie ding contact with the arm 33 of the member 34:, so as to be sensitive to the slightest movement of either of the members 25 or 34..

The looped member 37 forms a convenient and readily operated means for stopping the machine by hand, at the will of the operator. Very little force is required to rock said member forward about its pivot shaft 35, and a very slight angular movement thereof efi'ects the depression of the rod 38 suficient to rock the treadle 16 into inoperative position, in the manner previously described, effecting the stopping of the machine.

I claim,

l. lln a wire drawing machine, the combination with a rotatable wire drawing block,

of a treadle operable to connect and disconnect said block with its driving power, a die box yieldingly held in a predetermined position by the tension of the wire being drawn therethrough by said block, and adapted by the release of said tension to move in a predetermined path, and an independently movable connection between said die box and treadle, adapted by the move ment of the former to rock the latter into inoperative position-to disconnect said block from its driving power.

2. In a wire drawing machine, the combination with a rotatable wire drawing block, of a treadle operable to connect and disconnect said block with its driving power, a die box yieldingly held in a predetermined polie sition by the tension of the wire being drawn box, whereby said pivoted member is opertherethrough by said block, and adapted by able, either by a loop in the wire or manthe release of said tension to move in a preually to move said treadle into inoperative determined path, a pivoted member adapted position, independently of any movement by is 5 to form an obstruction to a loop or kink in the die box.

the wire, and. independeitlyfmovakie means Dated this 22nd day of June 1914. bearing against said tree 1e or ho in said pivoted member in operative positioii and ELBERT CARROLL bearing against a portion of said member Witnesses: 10 which is interposed between said movable WILLARD A. WINN,

means and the path of movement of said die PAULINE W. B. Hus. 

